full-disclosure - NEW windows password encryption flaw..

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Message-ID: <1724813208.20030724002426@SECURITY.NNOV.RU>
From: 3APA3A at SECURITY.NNOV.RU (3APA3A)
Subject: NEW windows password encryption flaw..

Dear Darren Bennett,

Windows  uses  password  hash  in  a  same  way  as  Unix uses cleartext
password.  Having  password  hash  you  can  connect  to Windows network
without  knowledge  of  cleartext  password (I spent 2 minutes to modify
smbclient to use hash instead of password and 5 minutes to test, you can
try  to  do  it  as  a  challenge...  Hint:  all you need is to skip MD4
encoding  if  password  is already looks like MD4 hash). So, cracking of
Windows hashes gives you nothing in fact.

--Wednesday, July 23, 2003, 9:48:51 PM, you wrote to full-disclosure@...ts.netsys.com:

DB> Is this new? I read about it on slashdot...

DB> http://lasecpc13.epfl.ch/ntcrack/

DB> Basically, it seems that Microsoft has (yet again) screwed up the
DB> implementation of their encryption scheme. This makes cracking any hash
DB> a matter of seconds. Oops... 

-- 
~/ZARAZA
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